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https://issues.apache.org/jira/browse/HADOOP-13500?focusedWorklogId=697227&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-697227
 ]

ASF GitHub Bot logged work on HADOOP-13500:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 16/Dec/21 12:37
            Start Date: 16/Dec/21 12:37
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on pull request #3776:
URL: https://github.com/apache/hadoop/pull/3776#issuecomment-995778424


   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime | Comment |
   |:----:|----------:|--------:|:--------|
   | +0 :ok: |  reexec  |   0m  0s |  Docker mode activated.  |
   | -1 :x: |  docker  |  13m  7s |  Docker failed to build 
yetus/hadoop:b8dc05efcd1.  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | GITHUB PR | https://github.com/apache/hadoop/pull/3776 |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3776/2/console |
   | versions | git=2.17.1 |
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 697227)
    Time Spent: 50m  (was: 40m)

> Concurrency issues when using Configuration iterator
> ----------------------------------------------------
>
>                 Key: HADOOP-13500
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13500
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>            Reporter: Jason Darrell Lowe
>            Assignee: Dhananjay Badaya
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> It is possible to encounter a ConcurrentModificationException while trying to 
> iterate a Configuration object.  The iterator method tries to walk the 
> underlying Property object without proper synchronization, so another thread 
> simultaneously calling the set method can trigger it.



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